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|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
*
* Copyright (C) IBM Corporation, 2011
*
* Author: Anton Blanchard <anton@au.ibm.com>
*/
#include <asm/ppc_asm.h>
#ifndef SELFTEST_CASE
/* 0 == don't use VMX, 1 == use VMX */
#define SELFTEST_CASE 0
#endif
#ifdef __BIG_ENDIAN__
#define LVS(VRT,RA,RB) lvsl VRT,RA,RB
#define VPERM(VRT,VRA,VRB,VRC) vperm VRT,VRA,VRB,VRC
#else
#define LVS(VRT,RA,RB) lvsr VRT,RA,RB
#define VPERM(VRT,VRA,VRB,VRC) vperm VRT,VRB,VRA,VRC
#endif
.macro err1
100:
EX_TABLE(100b,.Ldo_err1)
.endm
.macro err2
200:
EX_TABLE(200b,.Ldo_err2)
.endm
#ifdef CONFIG_ALTIVEC
.macro err3
300:
EX_TABLE(300b,.Ldo_err3)
.endm
.macro err4
400:
EX_TABLE(400b,.Ldo_err4)
.endm
.Ldo_err4:
ld r16,STK_REG(R16)(r1)
ld r15,STK_REG(R15)(r1)
ld r14,STK_REG(R14)(r1)
.Ldo_err3:
bl exit_vmx_usercopy
ld r0,STACKFRAMESIZE+16(r1)
mtlr r0
b .Lexit
#endif /* CONFIG_ALTIVEC */
.Ldo_err2:
ld r22,STK_REG(R22)(r1)
ld r21,STK_REG(R21)(r1)
ld r20,STK_REG(R20)(r1)
ld r19,STK_REG(R19)(r1)
ld r18,STK_REG(R18)(r1)
ld r17,STK_REG(R17)(r1)
ld r16,STK_REG(R16)(r1)
ld r15,STK_REG(R15)(r1)
ld r14,STK_REG(R14)(r1)
.Lexit:
addi r1,r1,STACKFRAMESIZE
.Ldo_err1:
ld r3,-STACKFRAMESIZE+STK_REG(R31)(r1)
ld r4,-STACKFRAMESIZE+STK_REG(R30)(r1)
ld r5,-STACKFRAMESIZE+STK_REG(R29)(r1)
b __copy_tofrom_user_base
_GLOBAL(__copy_tofrom_user_power7)
cmpldi r5,16
cmpldi cr1,r5,3328
std r3,-STACKFRAMESIZE+STK_REG(R31)(r1)
std r4,-STACKFRAMESIZE+STK_REG(R30)(r1)
std r5,-STACKFRAMESIZE+STK_REG(R29)(r1)
blt .Lshort_copy
#ifdef CONFIG_ALTIVEC
test_feature = SELFTEST_CASE
BEGIN_FTR_SECTION
bgt cr1,.Lvmx_copy
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
#endif
.Lnonvmx_copy:
/* Get the source 8B aligned */
neg r6,r4
mtocrf 0x01,r6
clrldi r6,r6,(64-3)
bf cr7*4+3,1f
err1; lbz r0,0(r4)
addi r4,r4,1
err1; stb r0,0(r3)
addi r3,r3,1
1: bf cr7*4+2,2f
err1; lhz r0,0(r4)
addi r4,r4,2
err1; sth r0,0(r3)
addi r3,r3,2
2: bf cr7*4+1,3f
err1; lwz r0,0(r4)
addi r4,r4,4
err1; stw r0,0(r3)
addi r3,r3,4
3: sub r5,r5,r6
cmpldi r5,128
blt 5f
mflr r0
stdu r1,-STACKFRAMESIZE(r1)
std r14,STK_REG(R14)(r1)
std r15,STK_REG(R15)(r1)
std r16,STK_REG(R16)(r1)
std r17,STK_REG(R17)(r1)
std r18,STK_REG(R18)(r1)
std r19,STK_REG(R19)(r1)
std r20,STK_REG(R20)(r1)
std r21,STK_REG(R21)(r1)
std r22,STK_REG(R22)(r1)
std r0,STACKFRAMESIZE+16(r1)
srdi r6,r5,7
mtctr r6
/* Now do cacheline (128B) sized loads and stores. */
.align 5
4:
err2; ld r0,0(r4)
err2; ld r6,8(r4)
err2; ld r7,16(r4)
err2; ld r8,24(r4)
err2; ld r9,32(r4)
err2; ld r10,40(r4)
err2; ld r11,48(r4)
err2; ld r12,56(r4)
err2; ld r14,64(r4)
err2; ld r15,72(r4)
err2; ld r16,80(r4)
err2; ld r17,88(r4)
err2; ld r18,96(r4)
err2; ld r19,104(r4)
err2; ld r20,112(r4)
err2; ld r21,120(r4)
addi r4,r4,128
err2; std r0,0(r3)
err2; std r6,8(r3)
err2; std r7,16(r3)
err2; std r8,24(r3)
err2; std r9,32(r3)
err2; std r10,40(r3)
err2; std r11,48(r3)
err2; std r12,56(r3)
err2; std r14,64(r3)
err2; std r15,72(r3)
err2; std r16,80(r3)
err2; std r17,88(r3)
err2; std r18,96(r3)
err2; std r19,104(r3)
err2; std r20,112(r3)
err2; std r21,120(r3)
addi r3,r3,128
bdnz 4b
clrldi r5,r5,(64-7)
ld r14,STK_REG(R14)(r1)
ld r15,STK_REG(R15)(r1)
ld r16,STK_REG(R16)(r1)
ld r17,STK_REG(R17)(r1)
ld r18,STK_REG(R18)(r1)
ld r19,STK_REG(R19)(r1)
ld r20,STK_REG(R20)(r1)
ld r21,STK_REG(R21)(r1)
ld r22,STK_REG(R22)(r1)
addi r1,r1,STACKFRAMESIZE
/* Up to 127B to go */
5: srdi r6,r5,4
mtocrf 0x01,r6
6: bf cr7*4+1,7f
err1; ld r0,0(r4)
err1; ld r6,8(r4)
err1; ld r7,16(r4)
err1; ld r8,24(r4)
err1; ld r9,32(r4)
err1; ld r10,40(r4)
err1; ld r11,48(r4)
err1; ld r12,56(r4)
addi r4,r4,64
err1; std r0,0(r3)
err1; std r6,8(r3)
err1; std r7,16(r3)
err1; std r8,24(r3)
err1; std r9,32(r3)
err1; std r10,40(r3)
err1; std r11,48(r3)
err1; std r12,56(r3)
addi r3,r3,64
/* Up to 63B to go */
7: bf cr7*4+2,8f
err1; ld r0,0(r4)
err1; ld r6,8(r4)
err1; ld r7,16(r4)
err1; ld r8,24(r4)
addi r4,r4,32
err1; std r0,0(r3)
err1; std r6,8(r3)
err1; std r7,16(r3)
err1; std r8,24(r3)
addi r3,r3,32
/* Up to 31B to go */
8: bf cr7*4+3,9f
err1; ld r0,0(r4)
err1; ld r6,8(r4)
addi r4,r4,16
err1; std r0,0(r3)
err1; std r6,8(r3)
addi r3,r3,16
9: clrldi r5,r5,(64-4)
/* Up to 15B to go */
.Lshort_copy:
mtocrf 0x01,r5
bf cr7*4+0,12f
err1; lwz r0,0(r4) /* Less chance of a reject with word ops */
err1; lwz r6,4(r4)
addi r4,r4,8
err1; stw r0,0(r3)
err1; stw r6,4(r3)
addi r3,r3,8
12: bf cr7*4+1,13f
err1; lwz r0,0(r4)
addi r4,r4,4
err1; stw r0,0(r3)
addi r3,r3,4
13: bf cr7*4+2,14f
err1; lhz r0,0(r4)
addi r4,r4,2
err1; sth r0,0(r3)
addi r3,r3,2
14: bf cr7*4+3,15f
err1; lbz r0,0(r4)
err1; stb r0,0(r3)
15: li r3,0
blr
.Lunwind_stack_nonvmx_copy:
addi r1,r1,STACKFRAMESIZE
b .Lnonvmx_copy
.Lvmx_copy:
#ifdef CONFIG_ALTIVEC
mflr r0
std r0,16(r1)
stdu r1,-STACKFRAMESIZE(r1)
bl enter_vmx_usercopy
|